Hi Harish,
Thanks for your reply.
Actually I have tried this code for my query as some standard search view do.
My query is not a Dquery so I try the code blow:
DATA: lr_query_service TYPE REF TO cl_crm_bol_query_service.
lr_query_service = cl_crm_bol_query_service=>get_instance( 'CusClmQuery' ).
lr_query_service->clear_query_parameters( ).
lr_col->add( lr_query_service ).
typed_context->cusclmquery->set_collection( lr_col ).
The values in query is cleared, but still shown on WEBUI view.