A method for determining physical sidelink feedback channel, PSFCH, resources performed by a first communications device, comprising: receiving PSFCH resource configuration information from a second communications device; determining PSFCH resources in a target object based on the received PSFCH resource configuration information, wherein the target object comprises at least one of the following: a carrier, a bandwidth part, BWP, and a resource pool, and the PSFCH resources comprise PSFCH transmission resources, or PSFCH reception resources, or both PSFCH tranmission resources and PSFCH reception resources; and performing a target operation on feedback information on the PSFCH resources, wherein the target operation comprises at least one of a reception operation and a transmission operation; characterized in that: the PSFCH resource configuration information is used to at least indicate a resource number K of PSFCH resources in the target object; the determining PSFCH resources in a target object based on obtained PSFCH resource configuration information comprises: determining K contiguous frequency domain resources starting from a fifth frequency domain resource of the frequency domain resources in the target object as PSFCH resources, wherein the fifth frequency domain resource is any one of the following: the 1-st frequency domain resource or the last frequency domain resource of the frequency domain resources in the target object that are arranged in descending order of numbers; a reference resource indicated in the PSFCH resource configuration information; or a start resource indicated in the PSFCH resource configuration information. receiving PSFCH resource configuration information from a second communications device; determining PSFCH resources in a target object based on the received PSFCH resource configuration information, wherein the target object comprises at least one of the following: a carrier, a bandwidth part, BWP, and a resource pool, and the PSFCH resources comprise PSFCH transmission resources, or PSFCH reception resources, or both PSFCH tranmission resources and PSFCH reception resources; and performing a target operation on feedback information on the PSFCH resources, wherein the target operation comprises at least one of a reception operation and a transmission operation; characterized in that: the PSFCH resource configuration information is used to at least indicate a resource number K of PSFCH resources in the target object; the determining PSFCH resources in a target object based on obtained PSFCH resource configuration information comprises: determining K contiguous frequency domain resources starting from a fifth frequency domain resource of the frequency domain resources in the target object as PSFCH resources, wherein the fifth frequency domain resource is any one of the following: the 1-st frequency domain resource or the last frequency domain resource of the frequency domain resources in the target object that are arranged in descending order of numbers; a reference resource indicated in the PSFCH resource configuration information; or a start resource indicated in the PSFCH resource configuration information. the PSFCH resource configuration information is used to at least indicate a resource number K of PSFCH resources in the target object; the determining PSFCH resources in a target object based on obtained PSFCH resource configuration information comprises: determining K contiguous frequency domain resources starting from a fifth frequency domain resource of the frequency domain resources in the target object as PSFCH resources, wherein the fifth frequency domain resource is any one of the following: the 1-st frequency domain resource or the last frequency domain resource of the frequency domain resources in the target object that are arranged in descending order of numbers; a reference resource indicated in the PSFCH resource configuration information; or a start resource indicated in the PSFCH resource configuration information. determining K contiguous frequency domain resources starting from a fifth frequency domain resource of the frequency domain resources in the target object as PSFCH resources, wherein the fifth frequency domain resource is any one of the following: the 1-st frequency domain resource or the last frequency domain resource of the frequency domain resources in the target object that are arranged in descending order of numbers; a reference resource indicated in the PSFCH resource configuration information; or a start resource indicated in the PSFCH resource configuration information.