The invention discloses a positioning wrist strap convenient to dismount. The positioning wrist strap comprises a strap body and a positioning device, wherein fixing plates are fixed at two ends of the strap body, the positioning device comprises a fixing case, a positioning chip, a power supply, positioning posts, a sealing cover and a display, wherein a fixing groove is formed in the fixing case, the positioning chip and the power supply are both embedded into the positioning groove, the positioning posts are fixed on four sides of the fixing case, positioning holes are formed in the bottom of the sealing cover, the positioning posts are embedded in the positioning holes, four corners of the sealing cover are fixedly connected with the fixing case through screws, a through hole is formed in the middle of the sealing cover, the display is embedded in the sealing cover, the positioning chip is connected with the power supply and the display electrically, grooves are symmetrically formed in two sides of the fixing case, the fixing plates are embedded in the grooves, the positioning wrist strap is convenient to dismount, the bottom of the fixing strap is fixed through a magnet, so that the wrist strap is convenient to wear, the fixation stability can be increased by the aid of the magnet, and the wrist strap cannot fall off easily.