Abstract: In order to solve the problem of insufficient anchoring force of current expansion bolts, different types of expansion bolts on the market were referred to, and anchoring force tests were conducted on different walls. After analyzing the test results, it was found that there were deficiencies in the current expansion tube, and improvements were made accordingly. Added guide holes and maze shaped openings to enhance its guiding performance. Select the appropriate specification for wooden screws based on test results and the required torque value for tightening.

Key words: Expansion bolt, Anchoring force, Wooden screw, Guide