A novel method to realize time-sharing multiple optical traps is reported. Adding a tilted glass plate to the optical path,the laser propagation direction translates slightly. The dependence of trap position relying on the geometrical parameters of glass plate,such as plate site,thickness and tilted angle,are analyzed. A turnplate which is capable of loading as many as 8 glass plates of different thicknesses has been designed and fabricated. A direct current motor rotates the turnplate enabling mechanical chop of the laser beam,which forms the time-sharing multiple optical traps. Two and three polystyrene beads with different sizes are trapped by timing-sharing dual optical traps and tri-optical traps respectively. The distance between two adjacent traps varies when changing the tilted angle of the glass plate. Experimental results agree well with our theoretical ones discussed in the paper.