Chassis module for fixing electronic devices

A chassis module for fixing electronic devices, comprising:

• a fixing chassis unit having a fixing chassis body, a first fixing retaining structure disposed on a first lateral wall of the fixing chassis body, and a second fixing retaining structure disposed on a second lateral wall of the fixing chassis body;
• a first movable chassis unit detachably disposed in the fixing chassis body, wherein the first movable chassis unit has at least one first movable chassis body, a first movable retaining structure disposed on a first lateral wall of the at least one first movable chassis body and mated with the first fixing retaining structure, and a first crossing structure disposed on a second lateral wall of the at least one first movable chassis body, and the first crossing structure has at least one hooking hole and at least one inserting hole;
• a second movable chassis unit detachably disposed in the fixing chassis body, wherein the second movable chassis unit has at least one second movable chassis body, a second movable retaining structure disposed on a first lateral wall of the at least one second movable chassis body and mated with the second fixing retaining structure, and a second crossing structure disposed on a second lateral wall of the at least one second movable chassis body and mated with the first crossing structure, wherein the second crossing structure has at least one hooking element and at least one inserting element, the size of the at least one hooking element corresponds to the size of the at least one hooking hole, and one part of the size of the at least one inserting element corresponds to the size of the at least one inserting hole.