Swimming pool cleaner

A swimming pool cleaner, characterized in that, the swimming pool cleaner comprises a housing, a travelling device arranged at a bottom of the housing, and a filter screen arranged inside the housing, wherein the filter screen divides a space inside the housing into a water inlet chamber and a water outlet chamber, the water inlet chamber is in communication with water inlets at the bottom of the housing, two groups of power components with opposite driving directions are arranged in the water outlet chamber, and each of the two groups of power components comprise an impeller and a water outlet channel, the water outlet channel comprises a spiral portion and a linear flowing portion which are sequentially communicated, and an inlet of the impeller is communicated with the water outlet chamber, an outlet of the impeller is in communication with the spiral portion, the linear flowing portion is connected to a water outlet, and the linear flowing portion deflects to an outer side of a spiral direction of the spiral portion, a steering stressed portion is formed at a junction of the linear flowing portion and the spiral portion, and the water outlet is in communication with an outside of the housing and faces towards a direction that is opposite to the travelling direction of the travelling device.