A reversible submerged motor includes a double open end housing with an inside bracket, a barrel-like axle holder, which is affixed to the bracket of the housing and holds a winding around a tubular axle thereof, and a vane holder, which has a shaft pivotally supported in the tubular axle of the barrel-like holder, magnets equiangularly arranged outside the barrel-like axle holder corresponding to the winding, and a vane disposed outside the housing for moving water, two slotted semispherical caps respectively fastened to the two distal ends of the housing, two guards respectively fastened to the two ends of the housing around the semispherical caps for controlling water flowing angle, and a controller with a timer for controlling forward/backward alternative rotation time of the vane holder.