PURPOSE: This study aims to describe an innovative suprachoroidal space injection technique using a combination of 30 G and 22 G needles attached to a 1 ml injector. The efficacy and applicability of this technique in suprachoroidal injections are evaluated. METHODS: In this study, we conducted both RESULTS: The suprachoroidal injector successfully injected the solution into the suprachoroidal space of isolated porcine eyes and live rats without entering the vitreous cavity. CONCLUSION: The 22 G needle demonstrated sufficient rigidity and stability to ensure proper scleral compression, supporting the consistency of the injection depth. The 30 G needle exhibited exceptional sharpness and precision, allowing for more accurate control of the drug dosage. The appropriate force applied to the sclera facilitated the precise depth of injection. The angle of the needle, parallel to the corneal limbus, helped avoid penetration into the vitreous or subretinal space, reducing the risk of complications. This device offers new tools and methods for ophthalmic research and clinical practice, with significant clinical application prospects.